FDS9431A-F085 Equivalent & Substitute Parts

Part Overview

The FDS9431A-F085 is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 3.5A continuous drain current at 25°C. This device is packaged in an 8-SOIC surface mount configuration and is qualified to AEC-Q101 automotive standards. The FDS9431A-F085 carries an obsolete product status, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
FET Type	P-Channel
Technology	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	20 V
Current - Continuous Drain (Id) @ 25°C	3.5A (Ta)
Rds On (Max) @ Id, Vgs	130mOhm @ 3.5A, 4.5V
Vgs(th) (Max) @ Id	1V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	8.5 nC @ 4.5 V
Vgs (Max)	±8V
Input Capacitance (Ciss) (Max) @ Vds	405 pF @ 10 V
Power Dissipation (Max)	2.5W (Ta)
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FDS9431A-F085 is determined by the following critical parameters: FET type (P-Channel), technology (MOSFET), drain-to-source voltage rating (Vdss), continuous drain current capability (Id), on-resistance (Rds On), gate threshold voltage (Vgs(th)), gate charge (Qg), maximum gate voltage (Vgs), input capacitance (Ciss), power dissipation rating, operating temperature range, mounting type, package configuration, automotive grade qualification, and RoHS compliance status.

Substitute parts must maintain P-Channel MOSFET topology with equivalent or superior electrical performance within the specified parameter ranges. The parts identified below are grouped based on their ability to satisfy the electrical and mechanical requirements of the FDS9431A-F085 in automotive applications.

Parameter Comparison

Parameter	FDS9431A-F085 (Main)	FDS9431A (Parametric Equivalent)	NVTFS9D6P04M8L (Similar)
Manufacturer	onsemi	onsemi	onsemi
FET Type	P-Channel	P-Channel	P-Channel
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	20 V	20 V	40 V
Current - Continuous Drain (Id) @ 25°C	3.5A (Ta)	3.5A (Ta)	13A (Ta), 64A (Tc)
Rds On (Max) @ Id, Vgs	130mOhm @ 3.5A, 4.5V	130mOhm @ 3.5A, 4.5V	9.5mOhm @ 20A, 10V
Vgs(th) (Max) @ Id	1V @ 250µA	1V @ 250µA	2.4V @ 580µA
Gate Charge (Qg) (Max) @ Vgs	8.5 nC @ 4.5 V	8.5 nC @ 4.5 V	34.6 nC @ 10 V
Vgs (Max)	±8V	±8V	±20V
Input Capacitance (Ciss) (Max) @ Vds	405 pF @ 10 V	405 pF @ 10 V	2312 pF @ 20 V
Power Dissipation (Max)	2.5W (Ta)	2.5W (Ta)	3.2W (Ta), 75W (Tc)
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 175°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-PowerWDFN (3.3x3.3)
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

FDS9431A (Parametric Equivalent)

The FDS9431A is the direct parametric equivalent to the FDS9431A-F085. This part maintains identical electrical specifications including 20V Vdss, 3.5A continuous drain current, 130mOhm Rds On, and all gate-level parameters. The FDS9431A carries an active product status and is available in the same 8-SOIC package configuration. Both parts are AEC-Q101 qualified, ROHS3 compliant, and rated for automotive applications across the -55°C to 150°C temperature range. The FDS9431A is the primary replacement for the obsolete FDS9431A-F085 when direct electrical and mechanical compatibility is required.

NVTFS9D6P04M8L (Similar Substitute)

The NVTFS9D6P04M8L is a higher-performance P-Channel MOSFET suitable for applications where enhanced current handling and thermal performance are beneficial. This device provides 40V Vdss (double the FDS9431A-F085 rating), 13A continuous drain current at 25°C ambient, and significantly lower on-resistance of 9.5mOhm. The NVTFS9D6P04M8L is packaged in an 8-PowerWDFN (3.3x3.3) configuration, which differs from the 8-SOIC package of the main part. This device is AEC-Q101 qualified, ROHS3 compliant, and rated for -55°C to 175°C operation. The NVTFS9D6P04M8L is suitable for substitution in applications where the circuit board layout can accommodate the different package footprint and where the enhanced electrical performance provides system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the FDS9431A directly replace the FDS9431A-F085 without circuit modifications?

A: Yes. The FDS9431A is a parametric equivalent with identical electrical specifications and the same 8-SOIC package. Both parts are AEC-Q101 qualified and ROHS3 compliant. Direct substitution is supported without circuit design changes.

Q: What are the key differences between the FDS9431A-F085 and NVTFS9D6P04M8L?

A: The NVTFS9D6P04M8L provides higher voltage rating (40V vs. 20V Vdss), higher current capability (13A vs. 3.5A), lower on-resistance (9.5mOhm vs. 130mOhm), and extended temperature range (-55°C to 175°C vs. -55°C to 150°C). The NVTFS9D6P04M8L uses an 8-PowerWDFN package instead of 8-SOIC, requiring different PCB layout.

Q: Is the NVTFS9D6P04M8L a pin-compatible replacement for the FDS9431A-F085?

A: No. The NVTFS9D6P04M8L uses an 8-PowerWDFN (3.3x3.3) package, while the FDS9431A-F085 uses an 8-SOIC (0.154", 3.90mm Width) package. These packages have different footprints and pin configurations. PCB redesign is required for substitution.

Q: Are all substitute parts automotive qualified?

A: Yes. Both the FDS9431A and NVTFS9D6P04M8L are AEC-Q101 qualified and rated for automotive applications. All parts listed maintain automotive grade designation and ROHS3 compliance.

Q: What is the moisture sensitivity level for these parts?

A: All parts listed carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture control requirements.

Q: Can the NVTFS9D6P04M8L be used in applications designed for the FDS9431A-F085 if the circuit operates below 20V?

A: The NVTFS9D6P04M8L is electrically compatible with applications operating at or below 20V Vdss. However, the different package footprint requires PCB redesign. The higher performance characteristics of the NVTFS9D6P04M8L do not create functional incompatibility in lower-voltage applications.

Q: What is the product status of each substitute part?

A: The FDS9431A carries active product status with high inventory availability (40,144 pcs). The NVTFS9D6P04M8L also carries active product status with 1,037 pcs in stock. Both parts are suitable for new designs and ongoing production.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message